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Modular Construction Break-Even Analysis: $136K Monthly Revenue


You’re carrying factory rent and a skilled team before every module ships, so the model has to show monthly overhead, variable project costs, and billing cadence This US modular construction break-even view uses Year 1 assumptions of $1097k fixed monthly costs, 196% variable expenses, and a $1365k break-even monthly revenue threshold across factory production, transport, and on-site assembly It does not promise lender approval, give tax advice, or replace site-specific permitting work


Fixed costs $110.1K/mo Monthly base
Contribution margin 81.5% Blended margin
Break-even revenue $135.1K/mo Sales target
Break-even timing Month 1 Launch month

Break-even calculator

Test monthly revenue, variable expenses, and fixed costs against break-even for a modular construction operation.

Money available to cover fixed costs $3,178,549 $3,737,917 revenue - $559,368 variable expenses
Margin ratio
85%
Covers fixed costs
Yes
Break-even chart Revenue Total costs
Plan Break-even $0 $0

Which modular construction expenses are fixed, variable, semi-variable, or semi-fixed at break-even?

Cost classification

Break-even is reliable only when each factory expense follows the right driver. Treat unit-level materials, labor, logistics, and sales-linked support as volume-driven, while rent and core salaries stay fixed inside the monthly planning range.

Expense Cost Break-Even Treatment Common Mistake
Factory Lease Fixed Include $25,000 per month in fixed overhead from Month 1 through Month 60. Spreading rent per module and hiding capacity risk.
Corporate Office Rent Fixed Include $8,000 per month as recurring fixed overhead. Treating office rent as tied to unit volume.
Management and Office Wages Fixed Use first-year salaries of $722,500, or about $60,208 per month, before later FTE changes. Mixing salaried staff with direct factory labor.
Raw Materials Variable Apply per module: $3,500 for Retail Kiosk up to $12,500 for Two Bed Home. Using one average material rate across all module types.
Direct Factory Labor Variable Apply per unit: $1,750 for Retail Kiosk up to $6,250 for Two Bed Home. Classifying direct build labor as fixed payroll.
Logistics per Unit Variable Apply per shipped unit: $600 for Retail Kiosk up to $2,000 for Two Bed Home. Burying haulage, crane time, or site delivery inside overhead.
Factory Utilities Semi-variable Model as 1.0% of revenue, then review for a base plant charge as volume scales. Treating all power and plant usage as fixed rent.
Production Supervision Semi-fixed Model as 0.6% of revenue unless added shifts or production lines require step changes. Letting supervision rise smoothly with every sale.

How does break-even change from a lean launch mix to a full factory mix in modular construction?

Scenario table

Even the lean launch mix clears fixed costs, and the cushion grows as factory throughput rises. The CM ratio (contribution margin ratio) edges up with scale, so overhead is easier to absorb.

Planning cases only; actual break-even will move with mix, labor, and factory uptime.
Scenario Monthly Revenue Variable Costs Fixed Costs CM Ratio Operating Profit Break-Even Signal
Lean launch mix $1.37m $268k $110k 80.4% $989k Break-even is covered, but the cushion is the thinnest here.
Base year 3 mix $3.74m $694k $117k 81.4% $2.93m This is the cleanest balance between volume and overhead absorption.
Full year 5 mix $6.98m $1.22m $126k 82.6% $5.64m Largest cushion; fixed costs are absorbed best at this throughput.

What breaks the break-even plan if output slips or costs run hot?

Stress test

This is a tight first-year plan: Year 1 monthly revenue is about $1.367M and break-even is about $1.365M, so the cushion is only about $2k. A 10% revenue miss or a 5-point margin hit breaks it fast.

Stress Case Changed Assumption Break-Even Revenue Revenue Gap Risk Signal
Current plan No change. $1.365M $2k cushion Tiny cushion; any slip matters.
Revenue shortfall Cut Year 1 monthly revenue by 10%. $1.365M $135k gap Progress billing delays wipe out the cushion.
Fixed-cost increase Raise fixed operating costs by 10%. $1.501M $134k gap Lease and payroll creep lift the floor.
Margin pressure Add 5 percentage points to variable expenses. $1.455M $88k gap Rework and transport overruns squeeze margin.
Combined pressure Cut revenue 10%, raise fixed costs 10%, and add 5 points of variable pressure. $1.601M $371k gap Delay plus cost creep leaves little room.

What should you verify before signing the factory lease and buying the first line?

Founder checklist

The model shows break-even in Month 1, but the real test is whether signed demand, margin, and cash can carry the factory, crew, and first projects. Hold back if cash is below $1.133M or if billing cannot cover the early fixed load.

1Backlog coverage$1.365M/mo

Don't lease the factory until signed or near-signed backlog can support at least $1.365M in monthly revenue.

2Fixed payroll$60.2K/mo

Don't add the core crew until billing cadence can cover about $60.2K of monthly wages without leaning on cash.

3Unit spread80%–84% CM

Check the planned unit mix still leaves roughly 80% to 84% contribution margin (cash left after variable costs) after unit costs, factory overhead, commissions, and installation support.

4Crew ramp6.5 FTE

Start with the Year 1 crew plan of 6.5 FTE and add headcount only when orders and progress billing keep the bench busy.

5Cash cushion$1.133M

Hold the launch if cash is below the model's $1.133M minimum, because setup spend and working capital hit before full billing.

6Setup gate$500K + $150K

Confirm the $500K line setup, $150K inventory build, haulage demand, installation support, quality control, safety upgrades, and progress billing before you buy the line or fleet.